:root{
  --bg:#0f172a; --side:#111827; --main:#f4f6fb; --card:#fff;
  --pri:#4f46e5; --pri2:#6366f1; --ok:#16a34a; --warn:#d97706; --err:#dc2626;
  --line:#e5e7eb; --txt:#1f2937; --mut:#6b7280;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--main);color:var(--txt)}
a{text-decoration:none;color:inherit}
.layout{display:flex;min-height:100vh}
/* sidebar */
.sidebar{width:230px;background:var(--side);color:#cbd5e1;display:flex;flex-direction:column;position:fixed;height:100vh;left:0;top:0}
.brand{padding:20px 18px;font-weight:700;font-size:18px;color:#fff;border-bottom:1px solid #1f2937}
.sidebar nav{flex:1;overflow-y:auto;padding:10px 0}
.sidebar nav a{display:flex;align-items:center;gap:10px;padding:11px 18px;color:#cbd5e1;font-size:14px;border-left:3px solid transparent}
.sidebar nav a:hover{background:#1f2937;color:#fff}
.sidebar nav a.active{background:#1f2937;color:#fff;border-left-color:var(--pri2)}
.sidebar .ico{width:20px;text-align:center}
.side-foot{padding:14px 18px;border-top:1px solid #1f2937;font-size:13px}
.side-foot .uinfo{color:#e5e7eb;margin-bottom:6px}
.side-foot .logout{color:#f87171;font-size:13px}
/* content */
.content{margin-left:230px;flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{padding:16px 26px;background:var(--card);border-bottom:1px solid var(--line)}
.topbar h1{font-size:20px}
.inner{padding:22px 26px}
.alert{padding:11px 16px;border-radius:8px;margin:0 26px;margin-top:16px;font-size:14px}
.alert-success{background:#dcfce7;color:#166534}
.alert-info{background:#dbeafe;color:#1e40af}
.alert-error{background:#fee2e2;color:#991b1b}
/* cards / grid */
.grid{display:grid;gap:16px}
.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.stat .n{font-size:28px;font-weight:700;color:var(--pri)}
.stat .l{color:var(--mut);font-size:13px;margin-top:4px}
/* table */
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:10px;overflow:hidden}
th,td{padding:11px 14px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
th{background:#f8fafc;color:var(--mut);font-weight:600}
tr:hover td{background:#fafafa}
/* forms */
label{display:block;font-size:13px;color:var(--mut);margin:12px 0 5px}
input[type=text],input[type=password],input[type=email],input[type=number],select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;background:#fff;color:var(--txt)}
textarea{min-height:120px;resize:vertical}
.form-row{display:flex;gap:14px}.form-row>div{flex:1}
/* buttons */
.btn{display:inline-block;padding:9px 16px;border:none;border-radius:8px;background:var(--pri);color:#fff;font-size:14px;cursor:pointer}
.btn:hover{background:var(--pri2)}
.btn-ghost{background:#eef2ff;color:var(--pri)}
.btn-sm{padding:5px 11px;font-size:13px}
.btn-danger{background:var(--err)}
.btn-warn{background:var(--warn)}
.btn-ok{background:var(--ok)}
.row-actions a{margin-right:8px;font-size:13px}
/* badges */
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px}
.badge-on{background:#dcfce7;color:#166534}
.badge-off{background:#fee2e2;color:#991b1b}
.badge-pri{background:#eef2ff;color:var(--pri)}
/* misc */
.muted{color:var(--mut);font-size:13px}
.flow{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.flow .step{background:#eef2ff;color:var(--pri);padding:7px 13px;border-radius:20px;font-size:13px}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
pre.box{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:8px;white-space:pre-wrap;font-size:13px;max-height:420px;overflow:auto}
.check-pass{color:var(--ok)} .check-fail{color:var(--err)}
.pagination a{padding:6px 11px;border:1px solid var(--line);margin-right:4px;border-radius:6px}
@media(max-width:900px){.cols-2,.cols-3,.cols-4{grid-template-columns:1fr}.sidebar{transform:translateX(-100%)}.content{margin-left:0}}